Calystegia macrostegia is a species in the Convolvulaceae (Morning Glory) family known by the common name Island Morning Glory. It is found on the Channel Islands and also on the mainland coast from Monterey County southward into Baja, Mexico. It is a woody perennial vine which may be a low and herbaceous or a stout, climbing plant which can approach 9 meters in length. The triangular leaves may be over 10 centimeters wide. It blooms over a long period, producing white to very pale pink blooms with corollas 2 to over 6 centimeters wide.

There are six recognized subspecies with overlapping ranges. There is also a commonly available horticultural variety known as 'Anacapa Pink'. It works best with a fence, trellis or something it can climb on, but can also be used as a ground cover. It grows so vigorously that it may need to be cut back annually. Plant in full sun along the coast. Inland give afternoon shade and additional water.

Plant Description

Plant Type

Vine, Perennial herb

Max. Height

1 ft (0.3 m)

Max. Width

20 - 30 ft (6.1 - 9.1 m)

Form

Spreading

Growth Rate

Fast

Dormancy

Summer Semi-Deciduous

Flower Color

Pink, White

Flowering Season

Spring, Summer, Winter

Spring

Summer

Fall

Winter

Native Status

Native

Natural Setting

Site Type

Dry, rocky places typically near the coast but sometimes in interior mountains and canyons